Indices · 2026-09-01
Six numbers to watch.
Daily market indices for LLM usage: reasoning share, free traffic, open weights, geography, concentration, and blended price. Formulas in the methodology.
420 models catalogued upstream on OpenRouter as of 2026-09-02.
Reasoning share
93.69%
+1.83pp · 30d
Free-traffic share
11.71%
+0.28pp · 30d
HHI (top-10)
552
+51.19 pts · 30d
Median $ / M paid
$0.900
+$0.49 · 30d
Reasoning Share Index
Share of tracked tokens going to reasoning-flagged models.
Free-Traffic Index
Share of tokens routed through :free variants.
HHI top-10 concentration
Herfindahl-Hirschman on the daily top-10 model shares. Higher = more concentrated.
Median blended price paid
Usage-weighted median of (0.3·prompt + 0.7·completion) $ / M tokens across all tracked models.
Peak tracked volume: 19T tokens/day.
Open weights vs closed
Share of tracked tokens routed to open-weights models.
China vs Western labs
Share of tracked tokens routed to Chinese labs versus US & European labs.
Top-10 HHI
Top-10 model share HHI stood at 552 on 2026-09-01 — higher = more concentrated. Source: Tidelines indices.